Jon and Rachel continued playing for a while, chatting away to each other in baby talk. Jon was getting more comfortable in his role and didn't really have to try to hard to stay in character. Neither noticed Biff and Laura standing at the door looking down at them like two doting mothers. Rachel was the first to notice and when she saw her mother she got up as fast as she could, albeit a little awkwardly. She toddled over to Laura, saying "Poop poop, poop poop." Laura knew exactly what she meant as she could get a faint smell of her dirty diaper.
Wanting to stay in character, Jon pretended to struggle to his feet and waddled over to Biff saying the same thing as Rachel had and pulling on Biff's' dress. Biff calmly told Jon that he would change him. He handed Laura a spare diaper and pack of wipes and told her she could change Rachel on his bed. The two doors were open so Biff didn't risk saying anything to Jon that might sound strange. He ushered him over to the changing table and got him to lie on his back. He pulled down Jon's tights and removed the dirty diaper. He gave Jon a good wipe to clean him up and as he fastened the clean diaper on him he spoke in a very soft voice, telling Jon what a good girl he was and how much he loved him. Jon was both embarrassed by the situation but also kind of happy that Biff was being so nice to him. He kept up his end and babbled back to Biff in the best baby voice he could manage.
Things weren't so peaceful in the other room. Rachel was growing cranky and cried as she was being changed. Biff was just helping Jon down from the changing table when Laura came in holding a sobbing Rachel on her shoulder. She told Biff that Rachel was tired and due her nap so they said a quick goodbye and Laura and Rachel headed downstairs and out the door. Laura said she'd text Biff before the weekend and restated how excited she was for their night out. Biff said his goodbyes and closed the front door. When he turned around Jon was standing behind him, still sucking on the pacifier.
"You can relax Jon. You can take out the pacifier now. It's just you and me again." Biff said to him. Jon left it in with a shrug of his shoulders, "It's kinda nice he said and I want to keep practicing before daycare tomorrow." Biff raised his eyebrow but didn't push the matter. He went into the kitchen to find something for lunch and Jon followed behind him, a little unsteady on his feet.
Biff fixed a simple lunch for himself and Jon and as they ate Biff filled Jon in on his experience getting changed in front of Laura. He told him all about seeing Laura in her bra and her breasts rubbing against his back. Jon was enthralled and a little bit jealous of Biff. He found Laura very attractive and knew that Biff did too. Finished with their lunch Biff asked Jon if he would like a drink. Jon said he would like some more milk and in the spirit of practicing for tomorrow Biff handed him another baby bottle. Jon took out his pacifier and got down from the table and headed for the TV. He curled up on the couch with his bottle which he was slowly nursing, enjoying the convenience of it. Jon felt himself pee a little bit into his diaper but it wasn't uncomfortable yet so he didn't pay it much notice. Biff took the remote and started to channel hop. Jon felt his eyes growing a bit heavy and before he knew it he fell asleep.
Biff noticed him drifting off and he sat for a while staring at Jon. He was conflicted, part of him knew Jon looked ridiculous. Here he was a young man his own age, sitting on a sofa, with a baby bottle in his mouth. He was wearing a very girly dress and tights and the bulge of his diaper was very obvious. But Biff was feeling something else too. A faint, growing love for Jon. He was starting to see him through a mother's eyes. The whole situation they found themselves in was absurd. Biff took his eyes off Jon and looked down at himself. Without even realizing it he had crossed his legs high above his knee when he sat down. He studied the dress he was wearing which had an intricate lace pattern. He could see the outline of his bra through the dress. Reaching into the neckline he ran his hand over the material of the bra. It was just as lacy as the dress and there was some padding in the cups. He removed his hand and then started rubbing it on his legs, which were now smooth and held tightly in a pair of pantyhose. He ran his hand up and down his leg, marveling at how soft it felt. Feeling under the dress his hand made it's way up his leg to the panties that were holding his penis snugly inside. He felt his penis twitching inside the panties, starting to grow. He was becoming aroused and images of Laura standing so close to him in her bra were coming back to him. He slowly uncrossed his legs to give himself some more room. Jon was fast asleep so Biff quietly stood up. He looked down and could see his penis tenting out the front of his dress. He gave it a squeeze through the soft material. The silk of his panties combined with the softness of the pantyhose and the dress felt incredible. He quietly walked out of the room and made his way up to his bedroom. His hips were swaying as he walked and his penis was bobbing up and down with every step.
Back in the privacy of his bedroom, Biff reached around to unzip his dress. He surprised himself with his flexibility as he got the zipper down. He peeled the dress off over his head and gave his penis another rub and squeeze through the pantyhose and panties. Biff grabbed his phone and pulled up some photos of the woman whose life he was now living. He tried to picture her in the underwear he was now wearing and felt his arousal grow even more. The perfume Laura had been wearing was still lingering in his room. He made his way onto his bed, lying on his front. He looked down at the bra he was wearing, again imaging a big pair of breasts filling the cups. He closed his eyes and imagined himself with that body as his groin automatically started to rub back and forth against his mattress. All manner of sexy thoughts were filling his brain, pictures of himself in a bikini with his boobs spilling out of the top, the feeling of Laura's boobs pressing up against his back, the soft material of the bra and panties he was wearing, the sliky feeling of the pantyhose on his legs. He was rubbing his legs back and forth against each other at the same time as he was grinding his crotch harder and harder into the bed. With one of his hands he was rubbing his chest through the soft bra cups and before long he exploded in one of the strongest orgasms he had ever felt. His penis erupted into his panties and he just lay there for a few minutes gathering his thoughts. Coming down from his arousal he now looked at himself and saw the mess he had made. He quickly made his way to the bathroom and turned on the shower, hoping to have himself cleaned up and dressed again before Jon woke up.